Upright exercise bikes allow for a variety of movement, such as riding while standing or in a racing position, so multiple muscle groups can be exercised as a biker changes position. Plus, users with conditions such as spinal stenosis or osteoarthritis may find the forward-leaning position on the upright bike to be most comfortable?compared to that of a recumbent bike. The Intenza 550 UBe2 is designed for ease of getting on and off the bike, includes precise seat adjustments, and adjusts to 40 resistance levels ? the most in the industry.